1. Some space objects are visible to the human eye
Today’s objective:
Recognize how the universe is arranged

2. How far is the Moon from Earth
Read through the procedure
Do the explore activity with your group
Answer the What do you think questions.
What do you think?
How does the scale model compare with your previous idea of the distance between Earth and the Moon?
How many Earths do you estimate would fit between Earth and the Moon?

3. Structures in the Universe
Gravity causes objects to be grouped together in space
1. Earth
orbits the Sun
Diameter is 8,000 miles
The Moon orbits the Earth
ORBIT: a path of an object in space as it moves around another object due to gravity
2. Solar System
Made up of the Sun, planets and other small objects
The Suns diameter is 100 times greater than earth

4. Structures in the Universe
3. Milky Way (a galaxy)
GALAXY: a group of millions/billions of stars are held together by their own gravity
4. Universe is everything!!!
It is the space and all the matter and energy in it
It has billions of galaxies (ex: Milky Way)

5. Constellation A group of stars that form a pattern in the sky
Astronomers have divided the sky into 88 constellations
Ancient Greeks named many constellations after animals